仁用杏抗寒性生理指标评价的研究

对抗寒性不同的3个仁用杏品种(抗寒性强弱排序为优一>白玉扁>龙王帽)枝条低温处理后,检测其萌芽率和抗寒性生理指标,并对这些生理指标与抗寒性的关系作了研究。结果表明,随温度的降低,萌芽率降低,电解质渗出率、可溶性糖和脯氨酸的含量、SOD和POD的酶活性呈上升趋势;仁用杏品种间抗寒性差异显著性分析显示,枝条的电解质渗出率、表皮的可溶性糖和游离脯氨酸的含量、木质部和表皮的POD酶活性可以作为仁用杏抗寒性能力评价指标,SOD酶活性不宜作为抗寒性评价指标;主成分分析表明,采用这些生理指标对仁用杏抗寒性进行综合评价的结果是可靠的。

Evaluation of cold-resistant physiological indices of kernel apricot

The germination rate and physiological indices of three cold-resistant kernel apricots(Youyi>Baiyubian> Longwangmao) under low temperature stress are studied.And the relationships between these physiological indices and cold resistance of kernel apricots are also analyzed.The results show that the germination rate decreases as the temperature decreases,while the rate of electrolyte leakage,the amounts of soluble sugar and proline and the activity of SOD and POD increase.The results of significant analysis to cold-resistant comparison among various kernel apricots show that the rate of electrolyte leakage in branch,the amounts of soluble sugar and proline in epidermis,the activity of POD in xylem and epiderm can be used to assess the cold resistance of kernel apricot except for the activity of SOD.The result of principal component analysis shows that it is reliable to comprehensively evaluate the cold resistance of kernel apricot by using these physiological indices.